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Advisor(s)
Abstract(s)
A presente tese de doutoramento tem como objectivo verificar se as
temperaturas regionais de uma determinada área de estudo podem ser afectadas pela
construção de uma barragem (Alqueva), bem como analisar a relação dessas
temperaturas com as áreas de rega. Este estudo incide sobre a região Sul da Península
Ibérica (Portugal e Espanha), nomeadamente Alqueva (Portel) e os concelhos de Beja e
Évora, em Portugal e os concelhos de Almería, Badajoz, Córdoba, Granada, Huelva,
Málaga, Múrcia e Sevilha em Espanha. Os indicadores utilizados são: temperatura
mínima, média e máxima diária ao longo do tempo e diferença entre o mesmo tipo de
temperatura entre o município em análise e o de referência.
Para se proceder a uma análise comparativa dos diferentes concelhos
analisados, decidiu-se dividir a análise das temperaturas até final do ano 2001, e de
2002 até 2007 (meses de Junho, Julho e Agosto meses onde a temperatura será
supostamente superior), pois a barragem do Alqueva viu as suas comportas de fundo e
de meio serem encerradas a 8 de Fevereiro do ano de 2002. Daí a opção por dividir os
dados obtidos nas datas supra referidas. Então, até ao final do ano de 2001 foram
analisados os concelhos supra referidos, tendo sido tomado como municípios de
referência os concelhos de Beja e Múrcia. Entre 2002 e 2007, optou-se por uma
comparação de temperaturas dos diferentes anos relativas aos meses de Junho, Julho e
Agosto entre a referência neste caso Beja (ou qualquer uma das outras estações
seguidamente mencionadas) e Alqueva e os municípios de Beja e Évora (referentes a
Portugal) e Badajoz, Córdoba, Sevilha (referentes a Espanha).
Na análise efectuada aplicaram-se diferentes Métodos Determinísticos,
Paramétricos t, Não Paramétricos e Estatística Descritiva, para permitir uma pesquisa e
recolha de dados adequados bem como um tratamento e organização dos mesmos.
Os resultados demonstram que o aumento da área de rega provoca um aumento
na maior parte dos indicadores analisados, nomeadamente aqueles que se referem às
temperaturas dos meses quentes do ano. Por sua vez, o aparecimento da barragem do
Alqueva revela uma diminuição na maior parte dos referidos indicadores. Contudo este
resultado não pode ser considerado definitivo, pois será preciso verificar se a barragem
do Alqueva influencia as temperaturas regionais pontualmente ou irá contribuir para a
ampliação do aquecimento global.
This doctoral thesis aims to establish whether the regional temperatures in a region under study, may be affected by the construction of a dam (Alqueva) and analyze its relationship with the areas of irrigation. This study focuses on the South of the Iberian Peninsula (Portugal and Spain), particularly in Portugal, Alqueva (Portel) and the municipalities of Beja and Évora, and Spain in the municipalities of Almería, Badajoz, Cordova, Granada, Huelva, Malaga, Murcia and Seville. The indicators used are: minimum temperature, average and maximum daily over time and the difference between the same type of temperature between the municipality in question and the reference. For a comparative analysis of different counties analyzed, it was decided to divide the analysis of temperatures by the end of 2001, and from 2002 to 2007 (June, July and August months where the temperature is supposedly better) because Alqueva saw the dam’s floodgates of their background and environment are closed on 8 February of 2002. Hence the option of splitting the data obtained on the dates mentioned above. So by the end of 2001, we analyzed the above mentioned counties, was used as local reference for the municipalities of Beja and Murcia. Between 2002 and 2007, it was decided by a comparison of temperatures of different years for the months of June, July and August between the reference case Beja (or any of the other stations mentioned below) and Alqueva and the municipalities of Beja and Évora (referring to Portugal), and, Badajoz, Cordoba and Seville (referring to Spain). In the analysis we applied different Deterministic Methods, Parametric t, No Parametric and Descriptive Statistics to allow a search and retrieval of data and appropriate treatment and organize them. The results show that increasing the area of irrigation causes an increase in most indicators analyzed, including those that refer to temperatures warmer months. In turn the appearance of the Alqueva dam shows a decrease in most of these indicators. However, this result can not be considered definitive, for checking to see if the Alqueva dam influence regional temperatures on time or will contribute to the expansion of global warming.
This doctoral thesis aims to establish whether the regional temperatures in a region under study, may be affected by the construction of a dam (Alqueva) and analyze its relationship with the areas of irrigation. This study focuses on the South of the Iberian Peninsula (Portugal and Spain), particularly in Portugal, Alqueva (Portel) and the municipalities of Beja and Évora, and Spain in the municipalities of Almería, Badajoz, Cordova, Granada, Huelva, Malaga, Murcia and Seville. The indicators used are: minimum temperature, average and maximum daily over time and the difference between the same type of temperature between the municipality in question and the reference. For a comparative analysis of different counties analyzed, it was decided to divide the analysis of temperatures by the end of 2001, and from 2002 to 2007 (June, July and August months where the temperature is supposedly better) because Alqueva saw the dam’s floodgates of their background and environment are closed on 8 February of 2002. Hence the option of splitting the data obtained on the dates mentioned above. So by the end of 2001, we analyzed the above mentioned counties, was used as local reference for the municipalities of Beja and Murcia. Between 2002 and 2007, it was decided by a comparison of temperatures of different years for the months of June, July and August between the reference case Beja (or any of the other stations mentioned below) and Alqueva and the municipalities of Beja and Évora (referring to Portugal), and, Badajoz, Cordoba and Seville (referring to Spain). In the analysis we applied different Deterministic Methods, Parametric t, No Parametric and Descriptive Statistics to allow a search and retrieval of data and appropriate treatment and organize them. The results show that increasing the area of irrigation causes an increase in most indicators analyzed, including those that refer to temperatures warmer months. In turn the appearance of the Alqueva dam shows a decrease in most of these indicators. However, this result can not be considered definitive, for checking to see if the Alqueva dam influence regional temperatures on time or will contribute to the expansion of global warming.
Description
Keywords
Engenharia Civil Hidráulica Barragem do Alqueva Engenharia Civil (área de especialização em Hidraúlica) . Faculdade de Ciências Exatas e da Engenharia